Color
#283f4d
#283f4drgb(40, 63, 77)hsl(203, 32%, 23%)oklch(0.355 0.038 236)Colors that go with #283f4d
Dark Olive Green, Steel Blue and Teal lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Dark Olive Green #556b2f
split-complementshippedDark Olive Green is a split-complement of #283f4d: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Steel Blue #4682b4
analogousshippedSteel Blue is #283f4d's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Teal #008080
analogousshippedTeal is #283f4d's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Sienna #a0522d
complementaryshippedSienna sits directly opposite #283f4d on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped12 real palettes, including Jeep's brand system and Alaska Airlines's brand system put Blue beside #283f4d, as the accent.
Blush Pink #e8b4b8
shipped5 real palettes, including Garden Wedding and Rain Garden put Blush Pink beside #283f4d, as the supporting colour.
Burlywood #deb887
shippedBurlywood is paired with #283f4d in 4 real palettes, including Polaroid and Coastal, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #283f4d: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #283f4d
Tints & shades
Harmonies
Contrast
| #283f4d as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 11:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.91:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #283f4d as the background.
Brands using this color
Fonts for this mood
#283f4d reads as cool, muted, dark. The font library is tagged with the same vocabulary:
Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #283f4d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/283f4d-9cb0c4-df4e5d-1f222d-e9f1f0?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md